The students will determine the freezing and melting point of water.

• Relate freezing point and melting point.
• Interpret a heating or cooling curve.
• Describe how temperature is affected by a phase change.

 

The following questions will guide student exploration during this activity:

How does temperature change when water freezes?

How does temperature change when ice melts?

How do the freezing and melting points of water compare?

In the first part of the investigation, students record the temperature of water in a test tube as it freezes. In the second part, they record the temperature of the ice as it melts. They compare the freezing and melting temperatures of the water and the ice.